CN203050819U - Power generation device combining steam Rankine cycle and low-boiling-point working medium Rankine cycle - Google Patents
Power generation device combining steam Rankine cycle and low-boiling-point working medium Rankine cycle Download PDFInfo
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- CN203050819U CN203050819U CN2013200421730U CN201320042173U CN203050819U CN 203050819 U CN203050819 U CN 203050819U CN 2013200421730 U CN2013200421730 U CN 2013200421730U CN 201320042173 U CN201320042173 U CN 201320042173U CN 203050819 U CN203050819 U CN 203050819U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model relates to a power generation device combining a steam Rankine cycle and a low-boiling-point working medium Rankine cycle. The low-boiling-point working medium in the low-boiling-point working medium (like ammonia steam) Rankine cycle is used for cooling the steam in the steam Rankine cycle, latent heat of vaporization of the steam in the steam Rankine cycle is recovered and used for power generation of the low-boiling-point working medium Rankine cycle, and therefore the steam Rankine cycle and the low-boiling-point working medium Rankine cycle are combined together. Meanwhile, the safety problem that the low-boiling-point working medium Rankine cycle recovers waste heat of smoke is solved, the temperature of exhausted smoke is effectively lowered, low-temperature corrosion of the smoke is avoided, and waste heat of waste gas, waste water and waste steam of the steam Rankine cycle is effectively recycled. The power generation device combining the steam Rankine cycle and the low-boiling-point working medium Rankine cycle is not only applicable to energy-saving modification of an existing unit, but also applicable to the design and construction of a newly built unit, is particularly suitable for new construction, extended construction and modified construction of a power generation unit in water-shortage areas and power-shortage areas, and has obvious economical, social and environmental benefits.
Description
Technical field
The present invention relates to a kind of steam Rankine-low boiling working fluid Rankine combined cycle generating unit, specifically belong to the thermal power plant field of power equipment technology.
Background technique
Being the thermal power plant of working medium with the water vapor, is to carry out on a large scale heat energy is transformed into mechanical energy, and the factory that transforms mechanical energy into electricity again.The circulation that the power station is used is very complicated, yet in essence, mainly the Rankine cycle of being made up of equipment such as boiler, steam turbine, vapour condenser, water pumps is finished, its working principle is: feedwater is sent into boiler earlier after the feed water pump pressurization, water is heated the superheated vapor of vaporization, formation High Temperature High Pressure in boiler, the superheated vapor acting of in steam turbine, expanding, become the exhaust steam of low-temp low-pressure, enter vapour condenser at last and be condensed into condensed water, through water pump condensed water is sent into boiler again and carry out new circulation.The complex loops of using as for the thermal power plant only on the Rankine cycle basis, in order to improve the thermal efficiency, is improved and the new circulation that forms is the backheat circulation, and the medium of backheat is water.Rankine cycle has become the basic circulation of modern steam power plant.
Modern big-and-middle-sized steam power plant all adopts the heated feed water backheat circulation of drawing gas without any exception, employing is drawn gas behind the backheat heated feed water, feed temperature is improved, thereby improved the heating mean temperature, except having improved thermal efficiency of cycle significantly, though specific steam consumption increases to some extent, owing to draw gas step by step the steam discharge rate is reduced, this is conducive to the internal efficiency ratio η of i.e. this circulation of ratio of actual acting amount and theoretical acting amount
OiRaising, solved the difficulty of large steam turbine exhaust stage blade negotiability restriction simultaneously, the vapour condenser volume also can correspondingly reduce.But still discharge a large amount of latent heats of vaporization when steam condenses in vapour condenser, need a large amount of water or air to cool off, namely wasted heat, caused thermo-pollution, wasted electric energy, water resources again.Therefore how effectively to utilize a large amount of latent heat of vaporization that discharges when steam condenses in the vapour condenser, be worth further investigation.
Give off a large amount of flue gases in the station boiler production process, wherein the heat of recyclable utilization is a lot.Also need in the station boiler running to ensure that by continuous blowdown and periodical blowdown the water quality of boiler meets demand for security, must remove the oxygen in the boiler feed water, to avoid the corrosion to steam generator system simultaneously.Thermal deaerator is the one preferred technique of station boiler at present, and oxygen-eliminating device is carried a large amount of working steams secretly and entered atmosphere in work.Owing to contain a large amount of heats and good water quality in boiler platoon water and the deaerator exhaust, if directly discharging will cause the great energy and the wasting of resources, and environment polluted.Though this two-part residual heat resources waste is huge, recycling has bigger difficulty, and its main cause is: the quality of (1) waste heat is lower, does not find the method for effectively utilizing; (2) waste heat of reclaimer's three parts is often made bigger change to the original thermodynamic system of boiler, has certain risk; (3) thermal balance question is difficult to tissue, is difficult to all directly utilize in inside plants, often needs outwards to seek suitable hot user, and hot user often have fluctuation with heat load, thereby limited the versatility of recovery method.
Gu Wei etc. (present Research and the development trend [J] of low temperature heat energy generating. thermal power engineering .2007.03.Vol.22, No.2.) introduced present Research and the development trend of domestic and international low temperature heat energy generation technology.From the development of low temperature heat energy generation technology research in recent years, research work mainly concentrates on aspects such as the improvement of the research of power cycle working medium and cyclic process and optimal controls.Kalina circulation, ammonia absorption type power refrigeration combined cycle etc. can reach the capacity usage ratio higher than simple cycle in theory.Significant when when considering, becoming factor to the influencing of system based on the generating of the thermodynamic (al) low temperature heat energy of finite time, may realize the maximization that the energy of system utilizes.Improving generating efficiency and environmental protection is the core content of low temperature pyroelectric technology.The Kalina circulation of mentioning in the literary composition, ammonia absorption type power refrigeration combined cycle scheduling theory merit attention.
The above-mentioned card Linne power generation technology of mentioning also has its intrinsic shortcoming: have inflammable, explosive characteristics such as poisonous as ammonia, when boiler or industrial furnace back-end ductwork utilize fume afterheat tissue card Linne circulating generation, dust etc. in the flue gas must be considered to the leakage that the wearing and tearing that are arranged in the heat exchanger in the flue, corrosion etc. cause, the explosion protection of drawing thus and protection of environment and job site etc. must be considered; Be the card Linne circulation of working medium with the ammonia water mixture, the ammonia in the ammoniacal liquor is inflammable, explosive, poisonous medium.This is card Linne power generation technology reclaims dust-laden, must solve when the fume afterheat of corrosive deposit is arranged in electric power station system a difficult problem.
Therefore how to utilize the thermomechanics basic law in steam Rankine cycle thermal power plant, use for reference the innovative approach that combined cycle scheduling theories such as thinking and Rankine-Kalina are organized in compound Rankine cycle, reservation is based on the advantage of the power plant technology of Rankine cycle principle, inquire into new combined cycle theory, really find the new way that increases substantially the thermodynamic cycle power plant thermal efficiency, become the difficult point of this area research.
Summary of the invention
Purpose of the present invention is for solving the shortcoming that technology such as above-mentioned steam Rankine cycle and the circulation of card Linne exist, a kind of steam Rankine-low boiling working fluid Rankine combined cycle generating unit is proposed, can substitute traditional steam Rankine cycle unit, solved the difficult problem that a large amount of latent heat of vaporization of discharging when steam condenses in the key issue of low boiling working fluid Rankine cycle unit safety operation and the vapour condenser reclaims simultaneously, adopt vapour condenser operation under positive pressure mode, latent heat of vaporization when steam condenses in the recovered steam Rankine cycle is used for low-temperature end low boiling working fluid Rankine cycle generating, thereby realize effectively improving the thermal efficiency of whole Combined Cycle Unit, finally reach energy-saving and cost-reducing, improve the purpose of system thermal efficiency.
The objective of the invention is to realize by following measure:
A kind of steam Rankine-low boiling working fluid Rankine combined cycle generating unit, this device comprises steam Rankine cycle, low boiling working fluid Rankine cycle, it is characterized in that:
Described steam Rankine cycle refers to the saturated vapour 2 that come out by boiler body 1, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives steam-driven generators 21 generatings; The exhaust steam 5 that steam turbine 4 comes out forms water of condensation 6 through superheater 9, condenser/evaporator 10, and water of condensation 6 produces saturated vapour again through feed water pump 7, feed water preheater 8, boiler body 1, thereby forms steam Rankine cycle loop.
Described low boiling working fluid Rankine cycle, refer to that liquid refrigerant 11 sends into condenser/evaporator 10, cooling vaporizer 12, vaporizer 14 respectively or successively through recycle pump 12, the low boiling working fluid steam that produces forms low boiling working fluid superheated vapor 16 through superheater 9, enter steam turbine 17 again, drawing generator 20 generatings, the exhaust steam of discharging from steam turbine 17 forms liquid refrigerant 11 through condenser 18 coolings, enters recycle pump 12 again, thereby forms low boiling working fluid Rankine cycle loop.
Described liquid refrigerant comprises low boiling working fluid, for one-component or multi-component be the mixing material of absorbing agent with higher boiling working medium, include but not limited to organic working medium, ammonia water mixture, the boiling point that low boiling working fluid is depressed at standard atmosphere is less than-10 ℃, and has good thermostability.
When described liquid refrigerant adopts multicomponent solution, liquid refrigerant 11 through recycle pump 12 or and regenerator 15 send into condenser/evaporator 10, cooling vaporizer 12, vaporizer 14 successively or respectively, the lean solution that forms through regenerator 15, pipeline 19 return condensed devices 18 backflow, the low boiling working fluid steam that produces forms liquid refrigerant 11 through superheater 9, steam turbine 17, vaporizer 14, condenser 18, return recycle pump 12, thereby form low boiling working fluid Rankine cycle loop.
The pressure of the exhaust steam 5 that described steam turbine 4 is discharged is higher than atmospheric pressure.
Described steam Rankine cycle loop and low boiling working fluid Rankine cycle loop by superheater 9, condenser/evaporator 10 or and cooling vaporizer 13 or and vaporizer 14, with the Rankine cycle of temperature end steam and organic being combined with each other of low-temperature end low boiling working fluid Rankine cycle, the latent heat of vaporization that discharges during the steam condensation of high efficiente callback temperature end steam Rankine cycle is used for low-temperature end low boiling working fluid Rankine cycle generating.
The heat transferring medium liquid refrigerant 11 of described cooling vaporizer 13 adopts the separated type heat exchange mode with flue gas, cooling vaporizer 13 comprises vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in the flue 23, condenser 13-2 is arranged in outside the flue 23, and phase-change working substance wherein adopts water or other suitable materials; Phase-change working substance absorbs flue gas in vaporizer 13-1 heat produces saturated vapour, saturated vapour is as the thermal source of liquid refrigerant 11, by condenser 13-2 and liquid refrigerant 11 wall-type heat exchanges, the cooling back forms condensation water and produces steam again by the heat of vaporizer 13-1 absorption flue gas again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation or pump circulation mode.
Be provided with exhaust steam regenerator 22: the low boiling working fluid steam that vaporizer 14 produces is got back to vaporizer 14 through exhaust steam regenerator 22, superheater 9, steam turbine 17, exhaust steam regenerator 22, vaporizer 14, condenser 18, recycle pump 12, thereby forms low boiling working fluid Rankine cycle loop.
Be provided with the makeup Water System supporting with the steam Rankine cycle system: the distilled water 24 in the distilled water tank 25, behind small pump 26,27 deoxygenations of normal temperature oxygen-eliminating device, mixed bed 28 desalinations, mend the steam Rankine cycle system.
Described feed water preheater 8, superheater 9, condenser/evaporator 10, cooling vaporizer 13, vaporizer 14, exhaust steam regenerator 22 can arrange one or more respectively, adopt series, parallel or series-parallel connection mode to connect.
The air 30 that gas fan 31 is sent here enters air preheater 32, form hot air 33, enter fuel-burning equipment 34 and participate in burning, the high-temperature flue gas of generation is discharged after reducing temperature through boiler body 1, superheater 2, feed water preheater 8, air preheater 32, vaporizer 13-1.
Described condenser 18 arranges according to routine techniques, adopts water or air etc. as cooling medium.
The heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe among the present invention, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
The a little higher than flue gas acid dew point temperature of wall surface temperature of control vaporizer 13-1 heat exchanger surface, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas can effectively reduce temperature of exhaust fume, when avoiding the flue gas low-temperature corrosion, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve among the present invention, be incubated, have the known mature technologies of employing such as regulatory function bypass facility and carry out supporting.
Be provided with the regulating controller with system support of the present invention, adopt the known ripe control technique of existing steam Rankine cycle power station, Cheng Shi cycle power plant or gas-steam combined cycle power plant to carry out supporting, make steam Rankine-Ka Linne combined cycle generating unit energy economy, safety, high thermal efficiency operation, reach energy saving purposes.
The present invention has following advantage compared to existing technology:
1, energy-saving effect is remarkable: the steam Rankine-low boiling working fluid Rankine combined cycle generating unit of the present invention's design, be different from traditional steam Rankine cycle based on the Rankine cycle principle and utilize vapor plume as the low boiling working fluid of thermal source such as the combined cycle system of ammonia steam Rankine cycle, adopt vapour condenser operation under positive pressure mode, with the thermal source of turbine discharge as the low boiling working fluid Rankine cycle, utilize the utilization of low boiling working fluid Rankine cycle system centering low-temperature heat source that more high-efficiency characteristics is arranged, with ingenious being combined with each other of vaporizer in vapour condenser and the low boiling working fluid Rankine cycle, the latent heat of vaporization of steam is utilized effectively, except steam sensible heat utilization etc. than the steam Rankine cycle has higher efficient, only utilize the latent heat of vaporization of steam to generate electricity this piece with regard to nearly 50 degree/more than the ton steam, therefore the absolute thermal efficiency of whole system improves more than 2%; Move because back pressure adopts the malleation mode, steam turbine outlet exhaust steam can guarantee certain degree of superheat, and the steam first pressing of newly-built unit can be adopted overcritical or ultra supercritical pressure, further improves the power generation cycle thermal efficiency.
2, low equipment investment, operating cost descend significantly:
(1) eliminated that traditional vapour condenser negative pressure operation technique inevitably leaks gas, water leakage phenomenon, need not in the Rankine cycle loop, to arrange oxygen-eliminating device, air ejector, the loss of steam and water of having avoided operations such as traditional oxygen-eliminating device, air ejector to cause; Avoided conventional art to reclaim pollution and the loss of steam and water of water of condensation, only need replenish the water loss that the turbine shaft leak sealing vapour of minute quantity causes, can mend into system by outsourcing or self-control distilled water;
(2) because of malleation, closed operation, avoided oxygen corrosion, the scaling phenomenon of traditional Rankine cycle steam generator system, system's loss of steam and water descends significantly, need not to be equipped with huge, complicated chemical water treatment system, the operating cost of water treatment system descends significantly, and absolute value can reduce by 90%;
(3) because of much smaller than traditional vapour condenser of the exhaust steam specific volume of steam turbine, the volume of steam turbine can reduce significantly, vapour condenser volume ratio conventional art much smaller, thereby the relative price of steam turbine, condenser apparatus reduces a lot.
3, the three wastes of power plant are realized integrated utilization: when the heat exchanger that back-end ductwork arranges adopts phase-change heat-exchanger, waste heat that can the high efficiente callback flue gas, temperature of exhaust fume can be reduced to about 120 ℃, when the phase-change heat-exchanger vaporizer adopts resistant material, temperature of exhaust fume can reduce more, reach about 85 ℃, operation to system for desulfuration and denitration is very favourable, when effectively avoiding the flue gas low-temperature corrosion, the heat that reclaims is used for the low boiling working fluid Rankine cycle system and efficiently generates electricity, and more meets the cascaded utilization of energy principle.Waste heats such as the waste water that the steam Rankine cycle system produces, waste vapour all can be included the low boiling working fluid Rankine cycle system in and recycle.Fundamentally eliminated other waste gas, waste water, waste vapour waste heat recovering device to the influence of whole unit circulation system, realized the integrated utilization of the real meaning of entire power plant system waste heat, effects such as water saving, joint vapour, economize on electricity are obvious.
4, safety in operation obviously improves:
(1) back pressure because of steam turbine in the steam Rankine cycle adopts the malleation mode to move, steam turbine outlet exhaust steam can guarantee certain degree of superheat, overcome the design that traditional Rankine cycle power generator turbine exhaust stage blade brings because of wet vapor, operation and safety problem, steam turbine back pressure operation under positive pressure, outlet steam is superheated vapor, fundamentally eliminated the problem design that last stage vane of steam turbine brings because of wet vapor in traditional steam Rankine cycle, make and operation problem, the operating conditions of steam turbine is optimized, and obviously improves before the vibration of steam turbine generator set;
(2) the oxygen corrosion Safety performance of steam boiler system is obviously improved, and has avoided traditional steam Rankine cycle generator set because of the operation of vapour condenser negative pressure, and air unavoidably bleeds and the oxygen corrosion that service system causes is endangered;
(3) scale hazard of steam Rankine cycle system is eliminated, and has effectively alleviated the generation of accidents such as the overheated booster of heating surface, and the operating conditions of superheater obviously improves, and Security obviously improves;
(4) than traditional card Linne circulating technology, when adopting preferred version, need not in flue, to arrange the heat exchanger of dividing wall type, the better split type phase-change heat-exchanger condenser separated type of Security that adopts in generation reclaims the heat of flue gas, and numerous safety problems that wearing and tearing, the corrosion that causes because of dust in flue gas, aggressive medium etc. causes low boiling working fluid to follow the flue gas contact to cause are solved at all; Low boiling working fluid carries out wall-type heat exchange in the phase-change heat-exchanger condenser, because nontoxic, the non-combustion-supporting material of water vapour, non-good characteristics such as flammable, fire-retardant, even leak, accident also obtains handling easily, control, the vaporizer in the low boiling working fluid Rankine cycle or and the operating conditions of superheater obviously improve;
(5) because steam Rankine cycle steam discharge adopts malleation, therefore can guide to the safe place of adopting the reliable protection measure by pipeline, low boiling working fluid Rankine cycle system (comprising the phase-change heat-exchanger condenser) can independently be arranged in the safe and reliable protective zone and be equipped with reliable safety installations, the problems of avoiding following the steam Rankine cycle system directly to be staggered in together and causing, the Security of low boiling working fluid Rankine cycle system is reliably guaranteed, for its industrial applications further eliminates safe hidden trouble.
Description of drawings
Fig. 1 is a kind of steam Rankine of the present invention-low boiling working fluid Rankine Rankine combined cycle generating unit schematic flow sheet.
Among Fig. 1: 1-boiler body, 2-saturated vapour, 3-superheater, the 3-1-superheated vapor, 4-steam turbine, 5-exhaust steam, the 6-water of condensation, 7-feed water pump, 8-feed water preheater, the 9-superheater, 10-condenser/evaporator, 11-liquid refrigerant, the 12-recycle pump, 13-cools off vaporizer, 13-1-vaporizer, the 13-2-condenser, 14-vaporizer, 15-regenerator, 16-low boiling working fluid superheated vapor, 17-steam turbine, 18-condenser, the 19-liquid that backflows, 20-generator, 21-steam-driven generator, 22-exhaust steam regenerator, 23-flue, 24-distilled water, the 25-distilled water tank, 26-small pump, 27-oxygen-eliminating device, 28-mixed bed, the 29-water pipeline that backflows, the 30-air, the 31-gas fan, 32-air preheater, 33-fuel-burning equipment.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of steam Rankine-low boiling working fluid Rankine combined cycle generating unit, this device comprises steam Rankine cycle, low boiling working fluid Rankine cycle system, specific embodiment is as follows:
Ammonia water mixture is adopted in the Rankine cycle of ammonia steam.
Described steam Rankine cycle refers to the saturated vapour 2 that come out by boiler body 1, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives steam-driven generators 21 generatings; The exhaust steam 5 that steam turbine 4 comes out forms water of condensation 6 through superheater 9, condenser/evaporator 10, and water of condensation 6 produces saturated vapour again through feed water pump 7, feed water preheater 8, boiler body 1, thereby forms steam Rankine cycle loop.
In the described ammonia steam Rankine cycle loop, condenser/evaporator 10, cooling vaporizer 12, ammonia evaporator 14 adopt the parallel running mode, ammoniacal liquor 11 is through ammoniacal liquor recycle pump 12, regenerator 15, condenser/evaporator 10, ammoniacal liquor recycle pump 12, ammonia evaporator 14, exhaust steam regenerator 22, and ammoniacal liquor recycle pump 12,, condenser/evaporator 10, the ammonia steam that produces forms ammoniacal liquor 11 through superheater 9, ammonia steam turbine 17, exhaust steam regenerator 22, ammonia evaporator 14, ammonia condenser 18, enter ammoniacal liquor recycle pump 12 again, thereby form ammonia steam Rankine cycle loop.
The pressure of the exhaust steam 5 that described steam turbine 4 is discharged is higher than atmospheric pressure.
The heat transferring medium ammoniacal liquor of described cooling vaporizer 13 and flue gas adopt the separated type heat exchange mode, cooling vaporizer 13 comprises vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in the flue 23, and condenser 13-2 is arranged in outside the flue 23, and phase-change working substance wherein adopts water; Phase-change working substance absorbs flue gas in vaporizer 13-1 heat produces saturated vapour, saturated vapour in condenser 13-2 as the thermal source of ammoniacal liquor, by condenser 13-2 and ammoniacal liquor 11 wall-type heat exchanges, the cooling back forms condensation water again by vaporizer 13-1, the heat that absorbs flue gas produces steam again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation.
Be provided with the makeup Water System supporting with the steam Rankine cycle system: the distilled water 24 in the distilled water tank 25, behind small pump 26,27 deoxygenations of normal temperature oxygen-eliminating device, mixed bed 28 desalinations, mend the steam Rankine cycle system.
The air 30 that gas fan 31 is sent here enters air preheater 32, form hot air 33, enter fuel-burning equipment 34 and participate in burning, the high-temperature flue gas of generation is discharged after reducing temperature through boiler body 1, superheater 2, feed water preheater 8, air preheater 32, vaporizer 13-1.
Described feed water preheater 8, superheater 9, condenser/evaporator 10, cooling vaporizer 13, ammonia evaporator 14, exhaust steam regenerator 22 can arrange one or more respectively, adopt series, parallel or series-parallel connection mode to connect.
Described ammonia condenser 18 arranges according to routine techniques, adopts water or air etc. as cooling medium.
The heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe among the present invention, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
The a little higher than flue gas acid dew point temperature of wall surface temperature of control vaporizer 13-1 heat exchanger surface, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas can effectively reduce temperature of exhaust fume, when avoiding the flue gas low-temperature corrosion, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve among the present invention, be incubated, have the known mature technologies of employing such as regulatory function bypass facility and carry out supporting.
Be provided with the regulating controller with system support of the present invention, adopt the known ripe control technique of existing steam Rankine cycle power station, Cheng Shi cycle power plant or gas-steam combined cycle power plant to carry out supporting, make steam Rankine-Ka Linne combined cycle generating unit energy economy, safety, high thermal efficiency operation, reach energy saving purposes.
Though the present invention with preferred embodiment openly as above, they are not to limit the present invention, anyly are familiar with this skill person, without departing from the spirit and scope of the invention, when doing various variations or retouching, belong to the present invention's protection domain equally certainly.Therefore protection scope of the present invention should with the application claim was defined is as the criterion.
Claims (9)
1. steam Rankine-low boiling working fluid Rankine combined cycle generating unit, this device comprises steam Rankine cycle and low boiling working fluid Rankine cycle system, it is characterized in that:
The pressure of the exhaust steam (5) that steam turbine (4) is discharged in the described steam Rankine cycle is higher than atmospheric pressure;
Described steam Rankine cycle refers to the saturated vapour (2) that come out by boiler body (1), forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives steam-driven generator (21) generating; The exhaust steam (5) that steam turbine (4) comes out through superheater (9) or and condenser/evaporator (10), low boiling working fluid cooling by the low boiling working fluid Rankine cycle forms water of condensation (6), water of condensation (6) is through feed water pump (7), boiler body (1), produce saturated vapour again, thereby form steam Rankine cycle loop;
Described low boiling working fluid Rankine cycle loop is provided with superheater (9): liquid refrigerant (11) is through recycle pump (12), condenser/evaporator (10), the low boiling working fluid steam that produces forms low boiling working fluid superheated vapor (16) through superheater (9), enter steam turbine (17) again, drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) forms liquid refrigerant (11) through condenser (18) cooling, enter recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop; Or liquid refrigerant (11) is through recycle pump (12), vaporizer (14), the low boiling working fluid steam that produces forms low boiling working fluid superheated vapor (16) through superheater (9), enter steam turbine (17) again, drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) forms liquid refrigerant (11) through condenser (18) cooling, enter recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop; Or liquid refrigerant (11) is through recycle pump (12), cooling vaporizer (13), the low boiling working fluid steam that produces forms low boiling working fluid superheated vapor (16) through superheater (9), enter steam turbine (17) again, drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) forms liquid refrigerant (11) through condenser (18) cooling, enter recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop;
The boiling point that described low boiling working fluid is depressed at standard atmosphere is less than-10 ℃.
2. device according to claim 1 is characterized in that:
Be provided with feed water preheater (8):
Saturated vapour (2) by boiler body (1) comes out forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives steam-driven generator (21) generating; The exhaust steam (5) that steam turbine (4) comes out through superheater (9) or and condenser/evaporator (10), low boiling working fluid cooling by the low boiling working fluid Rankine cycle forms water of condensation (6), water of condensation (6) is through feed water pump (7), feed water preheater (8), boiler body (1), produce saturated vapour again, thereby form steam Rankine cycle loop.
3. device according to claim 1 is characterized in that:
Be provided with regenerator (15):
The lean solution that the part or all of vaporizer of condenser/evaporator (10), vaporizer (14), cooling vaporizer (13) produces is got back to condenser (18) through regenerator (15), the pipeline that backflows (19); Liquid refrigerant (11) is through recycle pump (12), regenerator (15) or and condenser/evaporator (10) or and vaporizer (14) or and the part or all of generation low boiling working fluid steam of cooling vaporizer (13).
4. device according to claim 1 is characterized in that:
Be provided with exhaust steam regenerator (22):
Liquid refrigerant (11) forms liquid refrigerant (11) through the low boiling working fluid steam that recycle pump (12), vaporizer (14) produce through exhaust steam regenerator (22), superheater (9), steam turbine (17), exhaust steam regenerator (22), vaporizer (14), condenser (18), enter recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop; Or liquid refrigerant (11) forms liquid refrigerant (11) through the low boiling working fluid steam that recycle pump (12), condenser/evaporator (10) produce through exhaust steam regenerator (22), superheater (9), steam turbine (17), exhaust steam regenerator (22), condenser/evaporator (10), condenser (18), enter recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop.
5. according to the described device of one of claim 1 to 4, it is characterized in that:
Flue gas in the described cooling vaporizer (13) adopts the separated type heat exchange mode with liquid refrigerant (11): cooling vaporizer (13) comprises vaporizer (13-1), condenser (13-2), wherein vaporizer (13-1) is arranged in the flue (23), and condenser (13-2) is arranged in outside the flue (23); Phase-change working substance absorbs flue gas in vaporizer (13-1) heat produces saturated vapour, saturated vapour in condenser (13-2) as the thermal source of liquid refrigerant (11), by condenser (13-2) and liquid refrigerant (11) wall-type heat exchange, the cooling back forms condensation water again by vaporizer (13-1), the heat that absorbs flue gas produces steam again, thereby forms the interior circulation loop of phase-change working substance.
6. according to the described device of one of claim 1 to 4, it is characterized in that:
Be provided with makeup Water System: the distilled water (24) in the distilled water tank (25), mend the steam Rankine cycle system through small pump (26), normal temperature oxygen-eliminating device (27).
7. device according to claim 6 is characterized in that:
Be provided with mixed bed (23): the distilled water (24) in the distilled water tank (25), mend the steam Rankine cycle system through small pump (26), normal temperature oxygen-eliminating device (27), mixed bed (28).
8. device according to claim 7 is characterized in that:
Be provided with air preheater (32): the air (30) that gas fan (31) is sent here forms hot air (33) through air preheater (32), enter fuel-burning equipment (34) and participate in burning, the high-temperature flue gas of generation through boiler body (1), superheater (2) or and feed water preheater (8), air preheater (32) or and vaporizer (13-1) discharge after reducing temperature.
9. device according to claim 8 is characterized in that:
Described superheater (3), feed water preheater (8), superheater (9), condenser/evaporator (10), cooling vaporizer (13), vaporizer (14), air preheater (32), regenerator (15), exhaust steam regenerator (22) can arrange one or more respectively, adopt series, parallel or series-parallel connection mode to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200421730U CN203050819U (en) | 2013-01-27 | 2013-01-27 | Power generation device combining steam Rankine cycle and low-boiling-point working medium Rankine cycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200421730U CN203050819U (en) | 2013-01-27 | 2013-01-27 | Power generation device combining steam Rankine cycle and low-boiling-point working medium Rankine cycle |
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| Publication Number | Publication Date |
|---|---|
| CN203050819U true CN203050819U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200421730U Withdrawn - After Issue CN203050819U (en) | 2013-01-27 | 2013-01-27 | Power generation device combining steam Rankine cycle and low-boiling-point working medium Rankine cycle |
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| CN (1) | CN203050819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089355A (en) * | 2013-01-27 | 2013-05-08 | 南京瑞柯徕姆环保科技有限公司 | Steam Rankine-low boiling point working medium Rankine combined cycle power generation device |
-
2013
- 2013-01-27 CN CN2013200421730U patent/CN203050819U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089355A (en) * | 2013-01-27 | 2013-05-08 | 南京瑞柯徕姆环保科技有限公司 | Steam Rankine-low boiling point working medium Rankine combined cycle power generation device |
| WO2014114139A1 (en) * | 2013-01-27 | 2014-07-31 | 南京瑞柯徕姆环保科技有限公司 | Steam rankine-low boiling point working fluid rankine joint cycle power generation apparatus |
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